Bantu no 34 dong ka Besok kumpul soalnya

jawab

garis  2x + 3y = 8

(i) Rx = a , maka x' = 2a - x  dan y' = y

Rx = 2  →  a = 2

x' = 2(2) - x  →x= 4 - x'
y' = y → y = y' 

subs ke 2x+ 3y = 8
2 (4 - x') + 3(y') = 8
8 - 2x' + 3y' = 8
-2x' + 3y' = 0 ...(i)

(ii) T(a,b) = (2,-1)
x' + a = x" → x' = x" - 2
y' +b = y" → y' = y"+ 1
sub ke (i)
-2(x') + 3(y') = 0
-2(x" -2) + 3(y"  + 1) = 0
-2x" + 4 + 3y" + 3 =0
-2x" + 3y" + 7 = 0
atau
2x - 3y - 7= 0
2x - 3y = 7